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Finding the Fourth Proportional to 77,908.60, 107,488.05 and 43,912.90

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Solution

The fourth proportional to 77,908.60, 107,488.05 and 43,912.90 is: 60,585.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,908.60 : 107,488.05 = 43,912.90 : x
  2. Step 2: Convert to fraction form
    77,908.60/107,488.05 = 43,912.90/x
  3. Step 3: Cross multiply
    77,908.60x = 107,488.05 × 43,912.90
  4. Step 4: Simplify right side
    77,908.60x = 4,720,111,990.85
  5. Step 5: Solve for x
    x = 4,720,111,990.85/77,908.60
  6. Step 6: Final answer
    x = 60,585.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.